Elefsis Shipyards is a Greek shipbuilding company, also involved in other industrial constructions. Founded in 1968, it has constructed many types of ships, including the largest bulk carriers built in Greece, as well as military ships. The latter include the Jason-class tank landing ships (LST) developed by Elefsis Shipyards, a series of Fast Attack Crafts, and the largest ship of the Greek Navy, support ship Promitheus (A-374), on Italian designs.